Proper storage of bulk gelatin capsules is essential to maintain their quality, stability, and performance. Since gelatin is sensitive to environmental conditions such as temperature and humidity, incorrect storage can lead to problems like brittleness, deformation, or sticking. Whether you are a pharmaceutical manufacturer, supplement brand, or distributor, following the right storage practices will help preserve capsule integrity and extend shelf life.
Ideal Storage Conditions for Gelatin Capsules
1. Control Temperature
Gelatin capsules should be stored at a stable temperature between 15°C and 25°C (59°F–77°F).
Avoid high temperatures, which can soften capsules
Avoid low temperatures, which can make capsules brittle
Maintaining a consistent temperature is more important than small fluctuations.
2. Maintain Proper Humidity
Humidity plays a critical role in capsule stability.
Recommended relative humidity: 35%–65% RH
Low humidity (<30%) → capsules may crack or become brittle
High humidity (>70%) → capsules may soften, stick, or deform
Using a humidity-controlled storage environment is highly recommended.
3. Avoid Direct Sunlight
Exposure to sunlight or UV light can:
Degrade capsule material
Cause color fading
Affect product appearance
Store capsules in a cool, dark place or in opaque packaging.
4. Use Proper Packaging
Bulk gelatin capsules should always be kept in their original sealed packaging.
Best practices include:
Keep capsules in double-layer PE bags
Store inside fiber drums or cartons
Reseal packaging tightly after opening
Proper packaging helps maintain internal moisture balance.
5. Keep Away from Heat and Moisture Sources
Avoid storing capsules near:
Heating equipment
Air conditioning outlets
Water sources
Chemical storage areas
Environmental fluctuations can negatively impact capsule quality.
Storage Duration and Shelf Life
Typical shelf life: 3–5 years under proper conditions
Always follow the manufacturer's recommended expiration date
Use FIFO (First In, First Out) inventory management
Regular inspection of stored capsules is also recommended.
Handling Tips for Bulk Capsules
Proper handling is just as important as storage:
Avoid excessive handling or pressure on capsules
Do not expose capsules to open air for extended periods
Allow capsules to acclimate to room conditions before use
Use clean, dry equipment during handling
These steps help prevent capsule damage during production.
Common Storage Problems and Solutions
|
Problem |
Cause | Solution |
|---|---|---|
| Capsules become brittle | Low humidity | Increase humidity to 35–65% |
| Capsules stick together | High humidity | Improve ventilation and reduce moisture |
| Capsules deform | High temperature | Maintain stable temperature |
| Color fading | Sunlight exposure | Store in dark environment |
Frequently Asked Questions (FAQ)
1. Can gelatin capsules be refrigerated?
No, refrigeration is not recommended as low temperatures can make capsules brittle.
2. What happens if humidity is too high?
Capsules may soften, stick together, or lose shape.
3. How long can bulk capsules be stored?
Typically 3–5 years if stored under proper conditions.
4. Should capsules be kept in sealed containers?
Yes, always keep capsules sealed to maintain moisture balance.
5. Can capsules be stored after opening?
Yes, but they should be resealed immediately and stored in controlled conditions.
Conclusion
Storing bulk gelatin capsules properly is critical to maintaining their quality, performance, and shelf life. By controlling temperature, humidity, light exposure, and packaging conditions, manufacturers can ensure that capsules remain in optimal condition for production and end use.
Following these best practices will help reduce waste, improve production efficiency, and ensure consistent product quality in pharmaceutical and nutraceutical applications.
